Safety appliance for elevator-cars.



G. SCHENUK.

SAFETY APPLIANCE FOR ELEVATOR CARS.

APPLICATION TILED JULY 14, 1911 Patented Mar. 17, 1914.

LGQOJYU.

G. SOHENGK.

SAFETY APPLIANCE FOR ELEVATOR CARS.

APPLIOATION FILED JULY 1-1, 1911.

Patented Mar. 1'2, 1914:.

2 SHEETS-SHEET 2.

3 [ram Mia/ 5 64ml, J aims/1o of the ring is bent to-engage the other side wal of the casing. Preferably, the free end of the spring is seated within a notch 31 in a lug 32 that receives one of the 5 screws 20. Midway between the sides of the casing, the spring 30 is bent to form a laterally projecting, substantially V-shaped lug 33 which cotiperates witha pin 34 projecting from the face'of the locking member 21. This pin shifts past the projection 33 on the ,spring from one side to the other ,as the locking member moves between its operative and inoperative positions, so that the spring serves to hold the locking member in one or the other of such ositions and also as- -sists in completing t e movement of the locking member.-

The'shift of the. locking member from operative position is normally prevented by :35:"1Rt0h35 which is connected to a ing 36 on the outer'side wall of the casing by a pivot screw 37. This latch'is' provided with a "shoulder 38. A spring 39 extending between "the'l'atchhnd the inner side wall of 5 the casing normally holds the latch in positionwith the shoulder 38 thereon engaging the'end of the arm 24 on the locking mem- An electro-magnet 40 is fixed in posi- V firm within one end of the casing 16 and the 'gorarmature 41 of this magnet is mounted upon j; the latch 35; When the magnet is energized i' the latchis shifted to release the locking member 21' and permit the opening movement of the door. Preferably, also, the end of the latch extends through a slot 42 in the inner side wall of the casing so thatthe latch can be released manually by the conductor of the elevator car. As the safety locking appliance is arranged within the elevator shaft,'the latch cannot be released by passengers or other persons on the floor .'of the building outside of the elevator shaft, but can only be shifted to release the locking member by the conductor or other pers5 son on'the'cariend-then only when the car is op osite thedoor.

* achoffthe shaft doors 15-is-provided with a loclring' mechanism; as indicated in 'Fig. 1, and the circuits of the several mag-- nets40 which' release the door locks are controlled bya p'a'rt'or-i'nember which is moved in correspondence with the movement of the car, so :that eachjjo'f the magnets is. only energized to release the adjacent locking member whenthe car is oppositethe corresponding .door. This circuit controlled means comprises a commutator of suitable 1 form. That illustrated comprises a switch arm 43 arranged-to move across a series of 0 individual contacts 44 and a long contact bar 45.- The switch arm is connected to the car and is moved in correspondence with the movement thereof in any suitable man ner. fAs' fshown, the switch arm is driven flfi from the shaft of one of the. sheaves hav be wi ely varied without departure from ing a worm 46 thereon which drives a worm wheel 46 on a shaft 47. Beveled gears 48 and 49 connect the shaft 47 with a shaft 49v Whereon the commutator; switch arm 43 is mounted. When the elevator car 10 is opposite one of the doors 15 the circuit through the corresponding magnet 40 is closed to release the locking member 21 and permit the opening of the door. This circuit may be traced from the battery 50-by conductor '51 to the contact bar 45, switch 43 to one of the contacts 44 and thence by one of the conductors 52 to the magnet 40 and thence by a conductor 53 and a common return wire 54 back to the battery 50. When the car moves away from the door, the switch contact 43 moves away from'the corresponding contact 44. In this way, as the car travels'in either direction, the circuits of the severalmagnets 40 are successively opened andi closed, the circuit of each magnet being closed to release the corresponding loci; ;'only when the car is opposite the corresponding shaft door. If-for any reason the magnetAO fails to shift the latch 35 the car conductor, when his car is opposite the .door, can lift the latch and thus release the lock.

To prevent the movement of th? car when one of the doors is open, a series of normally closed switches 55, one at eachfloor, is interposed in the circuit of the operating motor 10 and each of these switches is arranged to be opened by the opening movement ofthe corresponding door. Each of these switches 55 is laminated and is mount-- ed upon but insulated from one arm 56 of a bell crank which is pivotally connected to a post on the bottom wall of the casing 16 by a screw bolt 57. A spring 58 connects the arm 56 to the end wall of the casing and normally holds th switch 55 in engagement I with a pairof i sulated contacts 59 arranged within the-casing and which are intel-posed in series in the conductor 12. The other arm 60 of the bell'crank is arranged to be engaged by the lockingmember 21, when the door is opened and the locking member shifted to inoperative position as show'n'in Fig. 4, to thereby shift the switch to open position. When any door 15 is thus opened the circuit'through the operating motor 10 is broken and the car can not be moved from its position opposite the door until the latter is closed. The conductors 12, 52-a-nd 53 extend through the opposite end walls of the casing 16 to the contacts 59 and to a pair of, insulated binding posts (51 that are connected to the ends of the coil of the magnet 40.

It i. obvious that the details set forth may the essentials of the invention as. defined in the'claims.

' I claim asmy invention 1. In safety appliances for elevators, the combination with the elevator car, shaft and 1 30 Loraine locking; members in operative position, electrouuagnels for releasing said latches, a commutator comprising a series of contacts connected to said magnets and a switch arm movable over said contacts, car hoisting mechanism and speed reducing ,acam connecting said car hoisting mechanism to said ovable switch arm, whereby the latter is moved in corresptm jlence with the more mcnt oil. the car to successively engage said contacts and release the latches of said locks, substantially described.

2. in safety appliances for elevators, the combination with the elevator car and opcrating motor therefor, an elevator shaft and shaft doors, a series of locking members for said doors, a series of latches for holding said locking members in operative position, electromagnets for releasing said. latches, a, member connected to and moved in correspondence to the movement of the car for suct ively opening and closing the circuits of said magnets, and a series of switches mounted independently of but adjacent said locking members and interposed in the circuit of said operating motor, said switches being normally spring heldv in closed position and arranged to be engaged and opened by said locking members when the latter are shifted to inoperative position, substantially as described.

.ln salcty appliances for elevators, the combination with the elevator car, shaft and shaftdoors, of a series oil? loci; for said doors, each oi said locks comprising a casinn, a notched locking member pivotally mounted Within said casing, 11 hook-lug on the door, arranged to extcrul in said casing and engage and shift said locking; imanher to and from operative giositiou, a spring for yicldingly holding; said locking u'icmbcr in iis operative and ii'iopcrative positions, a. pivoted spring held latch in said casing arranged to engage said locking member and hold the same in operative position, an eleclro-magmat in said casing," for releasing said latch, and a switch inlrrpm-ual in the circuit of said motor pivoted in said casing and normally spring; held in closed position, said locking: member being arranged to engage and op n said switch when shilled to its inoperative position, smh:=-:|';'intially as dcscribed,

4'. in safety appliances for elevators, the combination with the elevator shalt, shalt doors, the clcvalor car and hoisting mechanism therefor, of a series o'l" swingiug, double-armed locking: members for said doors, hook lugs seemed to and projecting froin the edges of said doors and arranged to engage the slam-vale arms cl? said lochiu; members to shill. the latter to and 'lroin opera-- tivc position, said locl-zing members having:

seats for said hook lugs between said arms thermii, a spring for yieldingly holding ach of said locking members both in its opcratim and in its inoperative position, latches for securing said locking members in their operative )ositions, clectro-magncls for rclcasing said latches, a ccnnnutator con'q'irising'a series of contacts electrically connected to said magnets, a pivoted switch arm and speed reducing gearing interposed between said hoisting, mechanism and said switch arm and arranged to move the latter in correspondence with the movement of the car to successively engage said contacts, substantially as described.

5. In a safety appliance for elevalors,the combination with the elevator car, shaft and shaft door, oi? a movable locking member for said door, a latch for holding said looking memhor in operative position, an electiomagnct for tripping said latch, and means moved in correspondence with the movement of the car lor automatically controlling the circuit of said magnet, said latch being manually releasable by the car conductor.

(5. in safety appliances for elevators, the coi'nbination with the elevator shaft and shaft door, of a casing mounted within said shaft, a shifting locking member in said casing, a log on the door cooperatin with said member and arranged to shift the same to and from operative position, a latch for holding said locking member in operative position arranged to be manually released by the car conductor, and an elcctroanagnet for automatically tri jiping, said latch.

i. In safety appliances for elevators, the combination with the elevator shaft and shaft door, oil. a casing mounted Within said shaft, a shifting locking member in said casing, a lug on the door coiipcrating with said member and arranged to shift the same to and from operative position, a latch for hohlino; said locking member in operative position; an clectro-magnct for tripping said latch, and a normally closed switch mounted indcpcinlcnllv cl said locking member. and arranged to be opened by the shift of said locking: member to inoperative position.

1%. in scil'cty appliances for elevators, the combination with the elevator car and operating electric motor therefor, the elevator shaft and shaft door, of a casing within said shaft, a swinging notchcd locking member in said casing, a projecting hook lug fixed to he door and arrangml to extend within said casing to coopcrate'with said locking member and shiltlhe latter to and from 0pcrative position, a spring held latch in said casi g for holding said locking member in operative position, an clcctromagnet in said ("using for tripping: said latch, a spring for l'liltlllllfl) holding; said lorlciin); member in inoperative position, a switch arm and infig 1,090,170

sulated contacts indeyendentof said lockin said switch arm .to its open position, sub member mounted-within saidtlcasing, saif stantially as described. contacts being interposedfin t a circuit 0 i saidwlecti'ic motor, and a spring for nor- I CHARLES -E mallyholding said switch arm in closed po- Witnesses:

sition, s'aidl'ocking member when shifted to ELEANOR: HgoENow, inoperative position being arranged to shift KATHAmNfiGERLAoH. 

